Linux-libre 4.7.1-gnupck-4.7.1-gnu

1 files changed, 0 insertions, 1773 deletions

diff --git a/drivers/staging/rdma/hfi1/file_ops.c b/drivers/staging/rdma/hfi1/file_ops.c
deleted file mode 100644
index c1c5bf82a..000000000
--- a/drivers/staging/rdma/hfi1/file_ops.c
+++ /dev/null
@@ -1,1773 +0,0 @@
-/*
- * Copyright(c) 2015, 2016 Intel Corporation.
- *
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * BSD LICENSE
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *  - Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  - Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *  - Neither the name of Intel Corporation nor the names of its
- *    contributors may be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-#include <linux/poll.h>
-#include <linux/cdev.h>
-#include <linux/vmalloc.h>
-#include <linux/io.h>
-
-#include <rdma/ib.h>
-
-#include "hfi.h"
-#include "pio.h"
-#include "device.h"
-#include "common.h"
-#include "trace.h"
-#include "user_sdma.h"
-#include "user_exp_rcv.h"
-#include "eprom.h"
-#include "aspm.h"
-#include "mmu_rb.h"
-
-#undef pr_fmt
-#define pr_fmt(fmt) DRIVER_NAME ": " fmt
-
-#define SEND_CTXT_HALT_TIMEOUT 1000 /* msecs */
-
-/*
- * File operation functions
- */
-static int hfi1_file_open(struct inode *, struct file *);
-static int hfi1_file_close(struct inode *, struct file *);
-static ssize_t hfi1_file_write(struct file *, const char __user *,
-			       size_t, loff_t *);
-static ssize_t hfi1_write_iter(struct kiocb *, struct iov_iter *);
-static unsigned int hfi1_poll(struct file *, struct poll_table_struct *);
-static int hfi1_file_mmap(struct file *, struct vm_area_struct *);
-
-static u64 kvirt_to_phys(void *);
-static int assign_ctxt(struct file *, struct hfi1_user_info *);
-static int init_subctxts(struct hfi1_ctxtdata *, const struct hfi1_user_info *);
-static int user_init(struct file *);
-static int get_ctxt_info(struct file *, void __user *, __u32);
-static int get_base_info(struct file *, void __user *, __u32);
-static int setup_ctxt(struct file *);
-static int setup_subctxt(struct hfi1_ctxtdata *);
-static int get_user_context(struct file *, struct hfi1_user_info *,
-			    int, unsigned);
-static int find_shared_ctxt(struct file *, const struct hfi1_user_info *);
-static int allocate_ctxt(struct file *, struct hfi1_devdata *,
-			 struct hfi1_user_info *);
-static unsigned int poll_urgent(struct file *, struct poll_table_struct *);
-static unsigned int poll_next(struct file *, struct poll_table_struct *);
-static int user_event_ack(struct hfi1_ctxtdata *, int, unsigned long);
-static int set_ctxt_pkey(struct hfi1_ctxtdata *, unsigned, u16);
-static int manage_rcvq(struct hfi1_ctxtdata *, unsigned, int);
-static int vma_fault(struct vm_area_struct *, struct vm_fault *);
-
-static const struct file_operations hfi1_file_ops = {
-	.owner = THIS_MODULE,
-	.write = hfi1_file_write,
-	.write_iter = hfi1_write_iter,
-	.open = hfi1_file_open,
-	.release = hfi1_file_close,
-	.poll = hfi1_poll,
-	.mmap = hfi1_file_mmap,
-	.llseek = noop_llseek,
-};
-
-static struct vm_operations_struct vm_ops = {
-	.fault = vma_fault,
-};
-
-/*
- * Types of memories mapped into user processes' space
- */
-enum mmap_types {
-	PIO_BUFS = 1,
-	PIO_BUFS_SOP,
-	PIO_CRED,
-	RCV_HDRQ,
-	RCV_EGRBUF,
-	UREGS,
-	EVENTS,
-	STATUS,
-	RTAIL,
-	SUBCTXT_UREGS,
-	SUBCTXT_RCV_HDRQ,
-	SUBCTXT_EGRBUF,
-	SDMA_COMP
-};
-
-/*
- * Masks and offsets defining the mmap tokens
- */
-#define HFI1_MMAP_OFFSET_MASK   0xfffULL
-#define HFI1_MMAP_OFFSET_SHIFT  0
-#define HFI1_MMAP_SUBCTXT_MASK  0xfULL
-#define HFI1_MMAP_SUBCTXT_SHIFT 12
-#define HFI1_MMAP_CTXT_MASK     0xffULL
-#define HFI1_MMAP_CTXT_SHIFT    16
-#define HFI1_MMAP_TYPE_MASK     0xfULL
-#define HFI1_MMAP_TYPE_SHIFT    24
-#define HFI1_MMAP_MAGIC_MASK    0xffffffffULL
-#define HFI1_MMAP_MAGIC_SHIFT   32
-
-#define HFI1_MMAP_MAGIC         0xdabbad00
-
-#define HFI1_MMAP_TOKEN_SET(field, val)	\
-	(((val) & HFI1_MMAP_##field##_MASK) << HFI1_MMAP_##field##_SHIFT)
-#define HFI1_MMAP_TOKEN_GET(field, token) \
-	(((token) >> HFI1_MMAP_##field##_SHIFT) & HFI1_MMAP_##field##_MASK)
-#define HFI1_MMAP_TOKEN(type, ctxt, subctxt, addr)   \
-	(HFI1_MMAP_TOKEN_SET(MAGIC, HFI1_MMAP_MAGIC) | \
-	HFI1_MMAP_TOKEN_SET(TYPE, type) | \
-	HFI1_MMAP_TOKEN_SET(CTXT, ctxt) | \
-	HFI1_MMAP_TOKEN_SET(SUBCTXT, subctxt) | \
-	HFI1_MMAP_TOKEN_SET(OFFSET, (offset_in_page(addr))))
-
-#define dbg(fmt, ...)				\
-	pr_info(fmt, ##__VA_ARGS__)
-
-static inline int is_valid_mmap(u64 token)
-{
-	return (HFI1_MMAP_TOKEN_GET(MAGIC, token) == HFI1_MMAP_MAGIC);
-}
-
-static int hfi1_file_open(struct inode *inode, struct file *fp)
-{
-	/* The real work is performed later in assign_ctxt() */
-	fp->private_data = kzalloc(sizeof(struct hfi1_filedata), GFP_KERNEL);
-	if (fp->private_data) /* no cpu affinity by default */
-		((struct hfi1_filedata *)fp->private_data)->rec_cpu_num = -1;
-	return fp->private_data ? 0 : -ENOMEM;
-}
-
-static ssize_t hfi1_file_write(struct file *fp, const char __user *data,
-			       size_t count, loff_t *offset)
-{
-	const struct hfi1_cmd __user *ucmd;
-	struct hfi1_filedata *fd = fp->private_data;
-	struct hfi1_ctxtdata *uctxt = fd->uctxt;
-	struct hfi1_cmd cmd;
-	struct hfi1_user_info uinfo;
-	struct hfi1_tid_info tinfo;
-	unsigned long addr;
-	ssize_t consumed = 0, copy = 0, ret = 0;
-	void *dest = NULL;
-	__u64 user_val = 0;
-	int uctxt_required = 1;
-	int must_be_root = 0;
-
-	/* FIXME: This interface cannot continue out of staging */
-	if (WARN_ON_ONCE(!ib_safe_file_access(fp)))
-		return -EACCES;
-
-	if (count < sizeof(cmd)) {
-		ret = -EINVAL;
-		goto bail;
-	}
-
-	ucmd = (const struct hfi1_cmd __user *)data;
-	if (copy_from_user(&cmd, ucmd, sizeof(cmd))) {
-		ret = -EFAULT;
-		goto bail;
-	}
-
-	consumed = sizeof(cmd);
-
-	switch (cmd.type) {
-	case HFI1_CMD_ASSIGN_CTXT:
-		uctxt_required = 0;	/* assigned user context not required */
-		copy = sizeof(uinfo);
-		dest = &uinfo;
-		break;
-	case HFI1_CMD_SDMA_STATUS_UPD:
-	case HFI1_CMD_CREDIT_UPD:
-		copy = 0;
-		break;
-	case HFI1_CMD_TID_UPDATE:
-	case HFI1_CMD_TID_FREE:
-	case HFI1_CMD_TID_INVAL_READ:
-		copy = sizeof(tinfo);
-		dest = &tinfo;
-		break;
-	case HFI1_CMD_USER_INFO:
-	case HFI1_CMD_RECV_CTRL:
-	case HFI1_CMD_POLL_TYPE:
-	case HFI1_CMD_ACK_EVENT:
-	case HFI1_CMD_CTXT_INFO:
-	case HFI1_CMD_SET_PKEY:
-	case HFI1_CMD_CTXT_RESET:
-		copy = 0;
-		user_val = cmd.addr;
-		break;
-	case HFI1_CMD_EP_INFO:
-	case HFI1_CMD_EP_ERASE_CHIP:
-	case HFI1_CMD_EP_ERASE_RANGE:
-	case HFI1_CMD_EP_READ_RANGE:
-	case HFI1_CMD_EP_WRITE_RANGE:
-		uctxt_required = 0;	/* assigned user context not required */
-		must_be_root = 1;	/* validate user */
-		copy = 0;
-		break;
-	default:
-		ret = -EINVAL;
-		goto bail;
-	}
-
-	/* If the command comes with user data, copy it. */
-	if (copy) {
-		if (copy_from_user(dest, (void __user *)cmd.addr, copy)) {
-			ret = -EFAULT;
-			goto bail;
-		}
-		consumed += copy;
-	}
-
-	/*
-	 * Make sure there is a uctxt when needed.
-	 */
-	if (uctxt_required && !uctxt) {
-		ret = -EINVAL;
-		goto bail;
-	}
-
-	/* only root can do these operations */
-	if (must_be_root && !capable(CAP_SYS_ADMIN)) {
-		ret = -EPERM;
-		goto bail;
-	}
-
-	switch (cmd.type) {
-	case HFI1_CMD_ASSIGN_CTXT:
-		ret = assign_ctxt(fp, &uinfo);
-		if (ret < 0)
-			goto bail;
-		ret = setup_ctxt(fp);
-		if (ret)
-			goto bail;
-		ret = user_init(fp);
-		break;
-	case HFI1_CMD_CTXT_INFO:
-		ret = get_ctxt_info(fp, (void __user *)(unsigned long)
-				    user_val, cmd.len);
-		break;
-	case HFI1_CMD_USER_INFO:
-		ret = get_base_info(fp, (void __user *)(unsigned long)
-				    user_val, cmd.len);
-		break;
-	case HFI1_CMD_SDMA_STATUS_UPD:
-		break;
-	case HFI1_CMD_CREDIT_UPD:
-		if (uctxt && uctxt->sc)
-			sc_return_credits(uctxt->sc);
-		break;
-	case HFI1_CMD_TID_UPDATE:
-		ret = hfi1_user_exp_rcv_setup(fp, &tinfo);
-		if (!ret) {
-			/*
-			 * Copy the number of tidlist entries we used
-			 * and the length of the buffer we registered.
-			 * These fields are adjacent in the structure so
-			 * we can copy them at the same time.
-			 */
-			addr = (unsigned long)cmd.addr +
-				offsetof(struct hfi1_tid_info, tidcnt);
-			if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
-					 sizeof(tinfo.tidcnt) +
-					 sizeof(tinfo.length)))
-				ret = -EFAULT;
-		}
-		break;
-	case HFI1_CMD_TID_INVAL_READ:
-		ret = hfi1_user_exp_rcv_invalid(fp, &tinfo);
-		if (ret)
-			break;
-		addr = (unsigned long)cmd.addr +
-			offsetof(struct hfi1_tid_info, tidcnt);
-		if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
-				 sizeof(tinfo.tidcnt)))
-			ret = -EFAULT;
-		break;
-	case HFI1_CMD_TID_FREE:
-		ret = hfi1_user_exp_rcv_clear(fp, &tinfo);
-		if (ret)
-			break;
-		addr = (unsigned long)cmd.addr +
-			offsetof(struct hfi1_tid_info, tidcnt);
-		if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
-				 sizeof(tinfo.tidcnt)))
-			ret = -EFAULT;
-		break;
-	case HFI1_CMD_RECV_CTRL:
-		ret = manage_rcvq(uctxt, fd->subctxt, (int)user_val);
-		break;
-	case HFI1_CMD_POLL_TYPE:
-		uctxt->poll_type = (typeof(uctxt->poll_type))user_val;
-		break;
-	case HFI1_CMD_ACK_EVENT:
-		ret = user_event_ack(uctxt, fd->subctxt, user_val);
-		break;
-	case HFI1_CMD_SET_PKEY:
-		if (HFI1_CAP_IS_USET(PKEY_CHECK))
-			ret = set_ctxt_pkey(uctxt, fd->subctxt, user_val);
-		else
-			ret = -EPERM;
-		break;
-	case HFI1_CMD_CTXT_RESET: {
-		struct send_context *sc;
-		struct hfi1_devdata *dd;
-
-		if (!uctxt || !uctxt->dd || !uctxt->sc) {
-			ret = -EINVAL;
-			break;
-		}
-		/*
-		 * There is no protection here. User level has to
-		 * guarantee that no one will be writing to the send
-		 * context while it is being re-initialized.
-		 * If user level breaks that guarantee, it will break
-		 * it's own context and no one else's.
-		 */
-		dd = uctxt->dd;
-		sc = uctxt->sc;
-		/*
-		 * Wait until the interrupt handler has marked the
-		 * context as halted or frozen. Report error if we time
-		 * out.
-		 */
-		wait_event_interruptible_timeout(
-			sc->halt_wait, (sc->flags & SCF_HALTED),
-			msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT));
-		if (!(sc->flags & SCF_HALTED)) {
-			ret = -ENOLCK;
-			break;
-		}
-		/*
-		 * If the send context was halted due to a Freeze,
-		 * wait until the device has been "unfrozen" before
-		 * resetting the context.
-		 */
-		if (sc->flags & SCF_FROZEN) {
-			wait_event_interruptible_timeout(
-				dd->event_queue,
-				!(ACCESS_ONCE(dd->flags) & HFI1_FROZEN),
-				msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT));
-			if (dd->flags & HFI1_FROZEN) {
-				ret = -ENOLCK;
-				break;
-			}
-			if (dd->flags & HFI1_FORCED_FREEZE) {
-				/*
-				 * Don't allow context reset if we are into
-				 * forced freeze
-				 */
-				ret = -ENODEV;
-				break;
-			}
-			sc_disable(sc);
-			ret = sc_enable(sc);
-			hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_ENB,
-				     uctxt->ctxt);
-		} else {
-			ret = sc_restart(sc);
-		}
-		if (!ret)
-			sc_return_credits(sc);
-		break;
-	}
-	case HFI1_CMD_EP_INFO:
-	case HFI1_CMD_EP_ERASE_CHIP:
-	case HFI1_CMD_EP_ERASE_RANGE:
-	case HFI1_CMD_EP_READ_RANGE:
-	case HFI1_CMD_EP_WRITE_RANGE:
-		ret = handle_eprom_command(fp, &cmd);
-		break;
-	}
-
-	if (ret >= 0)
-		ret = consumed;
-bail:
-	return ret;
-}
-
-static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from)
-{
-	struct hfi1_filedata *fd = kiocb->ki_filp->private_data;
-	struct hfi1_user_sdma_pkt_q *pq = fd->pq;
-	struct hfi1_user_sdma_comp_q *cq = fd->cq;
-	int ret = 0, done = 0, reqs = 0;
-	unsigned long dim = from->nr_segs;
-
-	if (!cq || !pq) {
-		ret = -EIO;
-		goto done;
-	}
-
-	if (!iter_is_iovec(from) || !dim) {
-		ret = -EINVAL;
-		goto done;
-	}
-
-	hfi1_cdbg(SDMA, "SDMA request from %u:%u (%lu)",
-		  fd->uctxt->ctxt, fd->subctxt, dim);
-
-	if (atomic_read(&pq->n_reqs) == pq->n_max_reqs) {
-		ret = -ENOSPC;
-		goto done;
-	}
-
-	while (dim) {
-		unsigned long count = 0;
-
-		ret = hfi1_user_sdma_process_request(
-			kiocb->ki_filp,	(struct iovec *)(from->iov + done),
-			dim, &count);
-		if (ret)
-			goto done;
-		dim -= count;
-		done += count;
-		reqs++;
-	}
-done:
-	return ret ? ret : reqs;
-}
-
-static int hfi1_file_mmap(struct file *fp, struct vm_area_struct *vma)
-{
-	struct hfi1_filedata *fd = fp->private_data;
-	struct hfi1_ctxtdata *uctxt = fd->uctxt;
-	struct hfi1_devdata *dd;
-	unsigned long flags, pfn;
-	u64 token = vma->vm_pgoff << PAGE_SHIFT,
-		memaddr = 0;
-	u8 subctxt, mapio = 0, vmf = 0, type;
-	ssize_t memlen = 0;
-	int ret = 0;
-	u16 ctxt;
-
-	if (!is_valid_mmap(token) || !uctxt ||
-	    !(vma->vm_flags & VM_SHARED)) {
-		ret = -EINVAL;
-		goto done;
-	}
-	dd = uctxt->dd;
-	ctxt = HFI1_MMAP_TOKEN_GET(CTXT, token);
-	subctxt = HFI1_MMAP_TOKEN_GET(SUBCTXT, token);
-	type = HFI1_MMAP_TOKEN_GET(TYPE, token);
-	if (ctxt != uctxt->ctxt || subctxt != fd->subctxt) {
-		ret = -EINVAL;
-		goto done;
-	}
-
-	flags = vma->vm_flags;
-
-	switch (type) {
-	case PIO_BUFS:
-	case PIO_BUFS_SOP:
-		memaddr = ((dd->physaddr + TXE_PIO_SEND) +
-				/* chip pio base */
-			   (uctxt->sc->hw_context * BIT(16))) +
-				/* 64K PIO space / ctxt */
-			(type == PIO_BUFS_SOP ?
-				(TXE_PIO_SIZE / 2) : 0); /* sop? */
-		/*
-		 * Map only the amount allocated to the context, not the
-		 * entire available context's PIO space.
-		 */
-		memlen = PAGE_ALIGN(uctxt->sc->credits * PIO_BLOCK_SIZE);
-		flags &= ~VM_MAYREAD;
-		flags |= VM_DONTCOPY | VM_DONTEXPAND;
-		vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
-		mapio = 1;
-		break;
-	case PIO_CRED:
-		if (flags & VM_WRITE) {
-			ret = -EPERM;
-			goto done;
-		}
-		/*
-		 * The credit return location for this context could be on the
-		 * second or third page allocated for credit returns (if number
-		 * of enabled contexts > 64 and 128 respectively).
-		 */
-		memaddr = dd->cr_base[uctxt->numa_id].pa +
-			(((u64)uctxt->sc->hw_free -
-			  (u64)dd->cr_base[uctxt->numa_id].va) & PAGE_MASK);
-		memlen = PAGE_SIZE;
-		flags &= ~VM_MAYWRITE;
-		flags |= VM_DONTCOPY | VM_DONTEXPAND;
-		/*
-		 * The driver has already allocated memory for credit
-		 * returns and programmed it into the chip. Has that
-		 * memory been flagged as non-cached?
-		 */
-		/* vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); */
-		mapio = 1;
-		break;
-	case RCV_HDRQ:
-		memaddr = uctxt->rcvhdrq_phys;
-		memlen = uctxt->rcvhdrq_size;
-		break;
-	case RCV_EGRBUF: {
-		unsigned long addr;
-		int i;
-		/*
-		 * The RcvEgr buffer need to be handled differently
-		 * as multiple non-contiguous pages need to be mapped
-		 * into the user process.
-		 */
-		memlen = uctxt->egrbufs.size;
-		if ((vma->vm_end - vma->vm_start) != memlen) {
-			dd_dev_err(dd, "Eager buffer map size invalid (%lu != %lu)\n",
-				   (vma->vm_end - vma->vm_start), memlen);
-			ret = -EINVAL;
-			goto done;
-		}
-		if (vma->vm_flags & VM_WRITE) {
-			ret = -EPERM;
-			goto done;
-		}
-		vma->vm_flags &= ~VM_MAYWRITE;
-		addr = vma->vm_start;
-		for (i = 0 ; i < uctxt->egrbufs.numbufs; i++) {
-			ret = remap_pfn_range(
-				vma, addr,
-				uctxt->egrbufs.buffers[i].phys >> PAGE_SHIFT,
-				uctxt->egrbufs.buffers[i].len,
-				vma->vm_page_prot);
-			if (ret < 0)
-				goto done;
-			addr += uctxt->egrbufs.buffers[i].len;
-		}
-		ret = 0;
-		goto done;
-	}
-	case UREGS:
-		/*
-		 * Map only the page that contains this context's user
-		 * registers.
-		 */
-		memaddr = (unsigned long)
-			(dd->physaddr + RXE_PER_CONTEXT_USER)
-			+ (uctxt->ctxt * RXE_PER_CONTEXT_SIZE);
-		/*
-		 * TidFlow table is on the same page as the rest of the
-		 * user registers.
-		 */
-		memlen = PAGE_SIZE;
-		flags |= VM_DONTCOPY | VM_DONTEXPAND;
-		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-		mapio = 1;
-		break;
-	case EVENTS:
-		/*
-		 * Use the page where this context's flags are. User level
-		 * knows where it's own bitmap is within the page.
-		 */
-		memaddr = (unsigned long)(dd->events +
-					  ((uctxt->ctxt - dd->first_user_ctxt) *
-					   HFI1_MAX_SHARED_CTXTS)) & PAGE_MASK;
-		memlen = PAGE_SIZE;
-		/*
-		 * v3.7 removes VM_RESERVED but the effect is kept by
-		 * using VM_IO.
-		 */
-		flags |= VM_IO | VM_DONTEXPAND;
-		vmf = 1;
-		break;
-	case STATUS:
-		memaddr = kvirt_to_phys((void *)dd->status);
-		memlen = PAGE_SIZE;
-		flags |= VM_IO | VM_DONTEXPAND;
-		break;
-	case RTAIL:
-		if (!HFI1_CAP_IS_USET(DMA_RTAIL)) {
-			/*
-			 * If the memory allocation failed, the context alloc
-			 * also would have failed, so we would never get here
-			 */
-			ret = -EINVAL;
-			goto done;
-		}
-		if (flags & VM_WRITE) {
-			ret = -EPERM;
-			goto done;
-		}
-		memaddr = uctxt->rcvhdrqtailaddr_phys;
-		memlen = PAGE_SIZE;
-		flags &= ~VM_MAYWRITE;
-		break;
-	case SUBCTXT_UREGS:
-		memaddr = (u64)uctxt->subctxt_uregbase;
-		memlen = PAGE_SIZE;
-		flags |= VM_IO | VM_DONTEXPAND;
-		vmf = 1;
-		break;
-	case SUBCTXT_RCV_HDRQ:
-		memaddr = (u64)uctxt->subctxt_rcvhdr_base;
-		memlen = uctxt->rcvhdrq_size * uctxt->subctxt_cnt;
-		flags |= VM_IO | VM_DONTEXPAND;
-		vmf = 1;
-		break;
-	case SUBCTXT_EGRBUF:
-		memaddr = (u64)uctxt->subctxt_rcvegrbuf;
-		memlen = uctxt->egrbufs.size * uctxt->subctxt_cnt;
-		flags |= VM_IO | VM_DONTEXPAND;
-		flags &= ~VM_MAYWRITE;
-		vmf = 1;
-		break;
-	case SDMA_COMP: {
-		struct hfi1_user_sdma_comp_q *cq = fd->cq;
-
-		if (!cq) {
-			ret = -EFAULT;
-			goto done;
-		}
-		memaddr = (u64)cq->comps;
-		memlen = PAGE_ALIGN(sizeof(*cq->comps) * cq->nentries);
-		flags |= VM_IO | VM_DONTEXPAND;
-		vmf = 1;
-		break;
-	}
-	default:
-		ret = -EINVAL;
-		break;
-	}
-
-	if ((vma->vm_end - vma->vm_start) != memlen) {
-		hfi1_cdbg(PROC, "%u:%u Memory size mismatch %lu:%lu",
-			  uctxt->ctxt, fd->subctxt,
-			  (vma->vm_end - vma->vm_start), memlen);
-		ret = -EINVAL;
-		goto done;
-	}
-
-	vma->vm_flags = flags;
-	hfi1_cdbg(PROC,
-		  "%u:%u type:%u io/vf:%d/%d, addr:0x%llx, len:%lu(%lu), flags:0x%lx\n",
-		    ctxt, subctxt, type, mapio, vmf, memaddr, memlen,
-		    vma->vm_end - vma->vm_start, vma->vm_flags);
-	pfn = (unsigned long)(memaddr >> PAGE_SHIFT);
-	if (vmf) {
-		vma->vm_pgoff = pfn;
-		vma->vm_ops = &vm_ops;
-		ret = 0;
-	} else if (mapio) {
-		ret = io_remap_pfn_range(vma, vma->vm_start, pfn, memlen,
-					 vma->vm_page_prot);
-	} else {
-		ret = remap_pfn_range(vma, vma->vm_start, pfn, memlen,
-				      vma->vm_page_prot);
-	}
-done:
-	return ret;
-}
-
-/*
- * Local (non-chip) user memory is not mapped right away but as it is
- * accessed by the user-level code.
- */
-static int vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
-{
-	struct page *page;
-
-	page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT));
-	if (!page)
-		return VM_FAULT_SIGBUS;
-
-	get_page(page);
-	vmf->page = page;
-
-	return 0;
-}
-
-static unsigned int hfi1_poll(struct file *fp, struct poll_table_struct *pt)
-{
-	struct hfi1_ctxtdata *uctxt;
-	unsigned pollflag;
-
-	uctxt = ((struct hfi1_filedata *)fp->private_data)->uctxt;
-	if (!uctxt)
-		pollflag = POLLERR;
-	else if (uctxt->poll_type == HFI1_POLL_TYPE_URGENT)
-		pollflag = poll_urgent(fp, pt);
-	else  if (uctxt->poll_type == HFI1_POLL_TYPE_ANYRCV)
-		pollflag = poll_next(fp, pt);
-	else /* invalid */
-		pollflag = POLLERR;
-
-	return pollflag;
-}
-
-static int hfi1_file_close(struct inode *inode, struct file *fp)
-{
-	struct hfi1_filedata *fdata = fp->private_data;
-	struct hfi1_ctxtdata *uctxt = fdata->uctxt;
-	struct hfi1_devdata *dd;
-	unsigned long flags, *ev;
-
-	fp->private_data = NULL;
-
-	if (!uctxt)
-		goto done;
-
-	hfi1_cdbg(PROC, "freeing ctxt %u:%u", uctxt->ctxt, fdata->subctxt);
-	dd = uctxt->dd;
-	mutex_lock(&hfi1_mutex);
-
-	flush_wc();
-	/* drain user sdma queue */
-	hfi1_user_sdma_free_queues(fdata);
-
-	/* release the cpu */
-	hfi1_put_proc_affinity(dd, fdata->rec_cpu_num);
-
-	/*
-	 * Clear any left over, unhandled events so the next process that
-	 * gets this context doesn't get confused.
-	 */
-	ev = dd->events + ((uctxt->ctxt - dd->first_user_ctxt) *
-			   HFI1_MAX_SHARED_CTXTS) + fdata->subctxt;
-	*ev = 0;
-
-	if (--uctxt->cnt) {
-		uctxt->active_slaves &= ~(1 << fdata->subctxt);
-		uctxt->subpid[fdata->subctxt] = 0;
-		mutex_unlock(&hfi1_mutex);
-		goto done;
-	}
-
-	spin_lock_irqsave(&dd->uctxt_lock, flags);
-	/*
-	 * Disable receive context and interrupt available, reset all
-	 * RcvCtxtCtrl bits to default values.
-	 */
-	hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS |
-		     HFI1_RCVCTRL_TIDFLOW_DIS |
-		     HFI1_RCVCTRL_INTRAVAIL_DIS |
-		     HFI1_RCVCTRL_TAILUPD_DIS |
-		     HFI1_RCVCTRL_ONE_PKT_EGR_DIS |
-		     HFI1_RCVCTRL_NO_RHQ_DROP_DIS |
-		     HFI1_RCVCTRL_NO_EGR_DROP_DIS, uctxt->ctxt);
-	/* Clear the context's J_KEY */
-	hfi1_clear_ctxt_jkey(dd, uctxt->ctxt);
-	/*
-	 * Reset context integrity checks to default.
-	 * (writes to CSRs probably belong in chip.c)
-	 */
-	write_kctxt_csr(dd, uctxt->sc->hw_context, SEND_CTXT_CHECK_ENABLE,
-			hfi1_pkt_default_send_ctxt_mask(dd, uctxt->sc->type));
-	sc_disable(uctxt->sc);
-	uctxt->pid = 0;
-	spin_unlock_irqrestore(&dd->uctxt_lock, flags);
-
-	dd->rcd[uctxt->ctxt] = NULL;
-
-	hfi1_user_exp_rcv_free(fdata);
-	hfi1_clear_ctxt_pkey(dd, uctxt->ctxt);
-
-	uctxt->rcvwait_to = 0;
-	uctxt->piowait_to = 0;
-	uctxt->rcvnowait = 0;
-	uctxt->pionowait = 0;
-	uctxt->event_flags = 0;
-
-	hfi1_stats.sps_ctxts--;
-	if (++dd->freectxts == dd->num_user_contexts)
-		aspm_enable_all(dd);
-	mutex_unlock(&hfi1_mutex);
-	hfi1_free_ctxtdata(dd, uctxt);
-done:
-	kfree(fdata);
-	return 0;
-}
-
-/*
- * Convert kernel *virtual* addresses to physical addresses.
- * This is used to vmalloc'ed addresses.
- */
-static u64 kvirt_to_phys(void *addr)
-{
-	struct page *page;
-	u64 paddr = 0;
-
-	page = vmalloc_to_page(addr);
-	if (page)
-		paddr = page_to_pfn(page) << PAGE_SHIFT;
-
-	return paddr;
-}
-
-static int assign_ctxt(struct file *fp, struct hfi1_user_info *uinfo)
-{
-	int i_minor, ret = 0;
-	unsigned swmajor, swminor, alg = HFI1_ALG_ACROSS;
-
-	swmajor = uinfo->userversion >> 16;
-	if (swmajor != HFI1_USER_SWMAJOR) {
-		ret = -ENODEV;
-		goto done;
-	}
-
-	swminor = uinfo->userversion & 0xffff;
-
-	if (uinfo->hfi1_alg < HFI1_ALG_COUNT)
-		alg = uinfo->hfi1_alg;
-
-	mutex_lock(&hfi1_mutex);
-	/* First, lets check if we need to setup a shared context? */
-	if (uinfo->subctxt_cnt) {
-		struct hfi1_filedata *fd = fp->private_data;
-
-		ret = find_shared_ctxt(fp, uinfo);
-		if (ret < 0)
-			goto done_unlock;
-		if (ret)
-			fd->rec_cpu_num = hfi1_get_proc_affinity(
-				fd->uctxt->dd, fd->uctxt->numa_id);
-	}
-
-	/*
-	 * We execute the following block if we couldn't find a
-	 * shared context or if context sharing is not required.
-	 */
-	if (!ret) {
-		i_minor = iminor(file_inode(fp)) - HFI1_USER_MINOR_BASE;
-		ret = get_user_context(fp, uinfo, i_minor - 1, alg);
-	}
-done_unlock:
-	mutex_unlock(&hfi1_mutex);
-done:
-	return ret;
-}
-
-/* return true if the device available for general use */
-static int usable_device(struct hfi1_devdata *dd)
-{
-	struct hfi1_pportdata *ppd = dd->pport;
-
-	return driver_lstate(ppd) == IB_PORT_ACTIVE;
-}
-
-static int get_user_context(struct file *fp, struct hfi1_user_info *uinfo,
-			    int devno, unsigned alg)
-{
-	struct hfi1_devdata *dd = NULL;
-	int ret = 0, devmax, npresent, nup, dev;
-
-	devmax = hfi1_count_units(&npresent, &nup);
-	if (!npresent) {
-		ret = -ENXIO;
-		goto done;
-	}
-	if (!nup) {
-		ret = -ENETDOWN;
-		goto done;
-	}
-	if (devno >= 0) {
-		dd = hfi1_lookup(devno);
-		if (!dd)
-			ret = -ENODEV;
-		else if (!dd->freectxts)
-			ret = -EBUSY;
-	} else {
-		struct hfi1_devdata *pdd;
-
-		if (alg == HFI1_ALG_ACROSS) {
-			unsigned free = 0U;
-
-			for (dev = 0; dev < devmax; dev++) {
-				pdd = hfi1_lookup(dev);
-				if (!pdd)
-					continue;
-				if (!usable_device(pdd))
-					continue;
-				if (pdd->freectxts &&
-				    pdd->freectxts > free) {
-					dd = pdd;
-					free = pdd->freectxts;
-				}
-			}
-		} else {
-			for (dev = 0; dev < devmax; dev++) {
-				pdd = hfi1_lookup(dev);
-				if (!pdd)
-					continue;
-				if (!usable_device(pdd))
-					continue;
-				if (pdd->freectxts) {
-					dd = pdd;
-					break;
-				}
-			}
-		}
-		if (!dd)
-			ret = -EBUSY;
-	}
-done:
-	return ret ? ret : allocate_ctxt(fp, dd, uinfo);
-}
-
-static int find_shared_ctxt(struct file *fp,
-			    const struct hfi1_user_info *uinfo)
-{
-	int devmax, ndev, i;
-	int ret = 0;
-	struct hfi1_filedata *fd = fp->private_data;
-
-	devmax = hfi1_count_units(NULL, NULL);
-
-	for (ndev = 0; ndev < devmax; ndev++) {
-		struct hfi1_devdata *dd = hfi1_lookup(ndev);
-
-		if (!(dd && (dd->flags & HFI1_PRESENT) && dd->kregbase))
-			continue;
-		for (i = dd->first_user_ctxt; i < dd->num_rcv_contexts; i++) {
-			struct hfi1_ctxtdata *uctxt = dd->rcd[i];
-
-			/* Skip ctxts which are not yet open */
-			if (!uctxt || !uctxt->cnt)
-				continue;
-			/* Skip ctxt if it doesn't match the requested one */
-			if (memcmp(uctxt->uuid, uinfo->uuid,
-				   sizeof(uctxt->uuid)) ||
-			    uctxt->jkey != generate_jkey(current_uid()) ||
-			    uctxt->subctxt_id != uinfo->subctxt_id ||
-			    uctxt->subctxt_cnt != uinfo->subctxt_cnt)
-				continue;
-
-			/* Verify the sharing process matches the master */
-			if (uctxt->userversion != uinfo->userversion ||
-			    uctxt->cnt >= uctxt->subctxt_cnt) {
-				ret = -EINVAL;
-				goto done;
-			}
-			fd->uctxt = uctxt;
-			fd->subctxt  = uctxt->cnt++;
-			uctxt->subpid[fd->subctxt] = current->pid;
-			uctxt->active_slaves |= 1 << fd->subctxt;
-			ret = 1;
-			goto done;
-		}
-	}
-
-done:
-	return ret;
-}
-
-static int allocate_ctxt(struct file *fp, struct hfi1_devdata *dd,
-			 struct hfi1_user_info *uinfo)
-{
-	struct hfi1_filedata *fd = fp->private_data;
-	struct hfi1_ctxtdata *uctxt;
-	unsigned ctxt;
-	int ret, numa;
-
-	if (dd->flags & HFI1_FROZEN) {
-		/*
-		 * Pick an error that is unique from all other errors
-		 * that are returned so the user process knows that
-		 * it tried to allocate while the SPC was frozen.  It
-		 * it should be able to retry with success in a short
-		 * while.
-		 */
-		return -EIO;
-	}
-
-	for (ctxt = dd->first_user_ctxt; ctxt < dd->num_rcv_contexts; ctxt++)
-		if (!dd->rcd[ctxt])
-			break;
-
-	if (ctxt == dd->num_rcv_contexts)
-		return -EBUSY;
-
-	fd->rec_cpu_num = hfi1_get_proc_affinity(dd, -1);
-	if (fd->rec_cpu_num != -1)
-		numa = cpu_to_node(fd->rec_cpu_num);
-	else
-		numa = numa_node_id();
-	uctxt = hfi1_create_ctxtdata(dd->pport, ctxt, numa);
-	if (!uctxt) {
-		dd_dev_err(dd,
-			   "Unable to allocate ctxtdata memory, failing open\n");
-		return -ENOMEM;
-	}
-	hfi1_cdbg(PROC, "[%u:%u] pid %u assigned to CPU %d (NUMA %u)",
-		  uctxt->ctxt, fd->subctxt, current->pid, fd->rec_cpu_num,
-		  uctxt->numa_id);
-
-	/*
-	 * Allocate and enable a PIO send context.
-	 */
-	uctxt->sc = sc_alloc(dd, SC_USER, uctxt->rcvhdrqentsize,
-			     uctxt->dd->node);
-	if (!uctxt->sc)
-		return -ENOMEM;
-
-	hfi1_cdbg(PROC, "allocated send context %u(%u)\n", uctxt->sc->sw_index,
-		  uctxt->sc->hw_context);
-	ret = sc_enable(uctxt->sc);
-	if (ret)
-		return ret;
-	/*
-	 * Setup shared context resources if the user-level has requested
-	 * shared contexts and this is the 'master' process.
-	 * This has to be done here so the rest of the sub-contexts find the
-	 * proper master.
-	 */
-	if (uinfo->subctxt_cnt && !fd->subctxt) {
-		ret = init_subctxts(uctxt, uinfo);
-		/*
-		 * On error, we don't need to disable and de-allocate the
-		 * send context because it will be done during file close
-		 */
-		if (ret)
-			return ret;
-	}
-	uctxt->userversion = uinfo->userversion;
-	uctxt->pid = current->pid;
-	uctxt->flags = HFI1_CAP_UGET(MASK);
-	init_waitqueue_head(&uctxt->wait);
-	strlcpy(uctxt->comm, current->comm, sizeof(uctxt->comm));
-	memcpy(uctxt->uuid, uinfo->uuid, sizeof(uctxt->uuid));
-	uctxt->jkey = generate_jkey(current_uid());
-	INIT_LIST_HEAD(&uctxt->sdma_queues);
-	spin_lock_init(&uctxt->sdma_qlock);
-	hfi1_stats.sps_ctxts++;
-	/*
-	 * Disable ASPM when there are open user/PSM contexts to avoid
-	 * issues with ASPM L1 exit latency
-	 */
-	if (dd->freectxts-- == dd->num_user_contexts)
-		aspm_disable_all(dd);
-	fd->uctxt = uctxt;
-
-	return 0;
-}
-
-static int init_subctxts(struct hfi1_ctxtdata *uctxt,
-			 const struct hfi1_user_info *uinfo)
-{
-	unsigned num_subctxts;
-
-	num_subctxts = uinfo->subctxt_cnt;
-	if (num_subctxts > HFI1_MAX_SHARED_CTXTS)
-		return -EINVAL;
-
-	uctxt->subctxt_cnt = uinfo->subctxt_cnt;
-	uctxt->subctxt_id = uinfo->subctxt_id;
-	uctxt->active_slaves = 1;
-	uctxt->redirect_seq_cnt = 1;
-	set_bit(HFI1_CTXT_MASTER_UNINIT, &uctxt->event_flags);
-
-	return 0;
-}
-
-static int setup_subctxt(struct hfi1_ctxtdata *uctxt)
-{
-	int ret = 0;
-	unsigned num_subctxts = uctxt->subctxt_cnt;
-
-	uctxt->subctxt_uregbase = vmalloc_user(PAGE_SIZE);
-	if (!uctxt->subctxt_uregbase) {
-		ret = -ENOMEM;
-		goto bail;
-	}
-	/* We can take the size of the RcvHdr Queue from the master */
-	uctxt->subctxt_rcvhdr_base = vmalloc_user(uctxt->rcvhdrq_size *
-						  num_subctxts);
-	if (!uctxt->subctxt_rcvhdr_base) {
-		ret = -ENOMEM;
-		goto bail_ureg;
-	}
-
-	uctxt->subctxt_rcvegrbuf = vmalloc_user(uctxt->egrbufs.size *
-						num_subctxts);
-	if (!uctxt->subctxt_rcvegrbuf) {
-		ret = -ENOMEM;
-		goto bail_rhdr;
-	}
-	goto bail;
-bail_rhdr:
-	vfree(uctxt->subctxt_rcvhdr_base);
-bail_ureg:
-	vfree(uctxt->subctxt_uregbase);
-	uctxt->subctxt_uregbase = NULL;
-bail:
-	return ret;
-}
-
-static int user_init(struct file *fp)
-{
-	unsigned int rcvctrl_ops = 0;
-	struct hfi1_filedata *fd = fp->private_data;
-	struct hfi1_ctxtdata *uctxt = fd->uctxt;
-
-	/* make sure that the context has already been setup */
-	if (!test_bit(HFI1_CTXT_SETUP_DONE, &uctxt->event_flags))
-		return -EFAULT;
-
-	/* initialize poll variables... */
-	uctxt->urgent = 0;
-	uctxt->urgent_poll = 0;
-
-	/*
-	 * Now enable the ctxt for receive.
-	 * For chips that are set to DMA the tail register to memory
-	 * when they change (and when the update bit transitions from
-	 * 0 to 1.  So for those chips, we turn it off and then back on.
-	 * This will (very briefly) affect any other open ctxts, but the
-	 * duration is very short, and therefore isn't an issue.  We
-	 * explicitly set the in-memory tail copy to 0 beforehand, so we
-	 * don't have to wait to be sure the DMA update has happened
-	 * (chip resets head/tail to 0 on transition to enable).
-	 */
-	if (uctxt->rcvhdrtail_kvaddr)
-		clear_rcvhdrtail(uctxt);
-
-	/* Setup J_KEY before enabling the context */
-	hfi1_set_ctxt_jkey(uctxt->dd, uctxt->ctxt, uctxt->jkey);
-
-	rcvctrl_ops = HFI1_RCVCTRL_CTXT_ENB;
-	if (HFI1_CAP_KGET_MASK(uctxt->flags, HDRSUPP))
-		rcvctrl_ops |= HFI1_RCVCTRL_TIDFLOW_ENB;
-	/*
-	 * Ignore the bit in the flags for now until proper
-	 * support for multiple packet per rcv array entry is
-	 * added.
-	 */
-	if (!HFI1_CAP_KGET_MASK(uctxt->flags, MULTI_PKT_EGR))
-		rcvctrl_ops |= HFI1_RCVCTRL_ONE_PKT_EGR_ENB;
-	if (HFI1_CAP_KGET_MASK(uctxt->flags, NODROP_EGR_FULL))
-		rcvctrl_ops |= HFI1_RCVCTRL_NO_EGR_DROP_ENB;
-	if (HFI1_CAP_KGET_MASK(uctxt->flags, NODROP_RHQ_FULL))
-		rcvctrl_ops |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB;
-	/*
-	 * The RcvCtxtCtrl.TailUpd bit has to be explicitly written.
-	 * We can't rely on the correct value to be set from prior
-	 * uses of the chip or ctxt. Therefore, add the rcvctrl op
-	 * for both cases.
-	 */
-	if (HFI1_CAP_KGET_MASK(uctxt->flags, DMA_RTAIL))
-		rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_ENB;
-	else
-		rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_DIS;
-	hfi1_rcvctrl(uctxt->dd, rcvctrl_ops, uctxt->ctxt);
-
-	/* Notify any waiting slaves */
-	if (uctxt->subctxt_cnt) {
-		clear_bit(HFI1_CTXT_MASTER_UNINIT, &uctxt->event_flags);
-		wake_up(&uctxt->wait);
-	}
-
-	return 0;
-}
-
-static int get_ctxt_info(struct file *fp, void __user *ubase, __u32 len)
-{
-	struct hfi1_ctxt_info cinfo;
-	struct hfi1_filedata *fd = fp->private_data;
-	struct hfi1_ctxtdata *uctxt = fd->uctxt;
-	int ret = 0;
-
-	memset(&cinfo, 0, sizeof(cinfo));
-	ret = hfi1_get_base_kinfo(uctxt, &cinfo);
-	if (ret < 0)
-		goto done;
-	cinfo.num_active = hfi1_count_active_units();
-	cinfo.unit = uctxt->dd->unit;
-	cinfo.ctxt = uctxt->ctxt;
-	cinfo.subctxt = fd->subctxt;
-	cinfo.rcvtids = roundup(uctxt->egrbufs.alloced,
-				uctxt->dd->rcv_entries.group_size) +
-		uctxt->expected_count;
-	cinfo.credits = uctxt->sc->credits;
-	cinfo.numa_node = uctxt->numa_id;
-	cinfo.rec_cpu = fd->rec_cpu_num;
-	cinfo.send_ctxt = uctxt->sc->hw_context;
-
-	cinfo.egrtids = uctxt->egrbufs.alloced;
-	cinfo.rcvhdrq_cnt = uctxt->rcvhdrq_cnt;
-	cinfo.rcvhdrq_entsize = uctxt->rcvhdrqentsize << 2;
-	cinfo.sdma_ring_size = fd->cq->nentries;
-	cinfo.rcvegr_size = uctxt->egrbufs.rcvtid_size;
-
-	trace_hfi1_ctxt_info(uctxt->dd, uctxt->ctxt, fd->subctxt, cinfo);
-	if (copy_to_user(ubase, &cinfo, sizeof(cinfo)))
-		ret = -EFAULT;
-done:
-	return ret;
-}
-
-static int setup_ctxt(struct file *fp)
-{
-	struct hfi1_filedata *fd = fp->private_data;
-	struct hfi1_ctxtdata *uctxt = fd->uctxt;
-	struct hfi1_devdata *dd = uctxt->dd;
-	int ret = 0;
-
-	/*
-	 * Context should be set up only once, including allocation and
-	 * programming of eager buffers. This is done if context sharing
-	 * is not requested or by the master process.
-	 */
-	if (!uctxt->subctxt_cnt || !fd->subctxt) {
-		ret = hfi1_init_ctxt(uctxt->sc);
-		if (ret)
-			goto done;
-
-		/* Now allocate the RcvHdr queue and eager buffers. */
-		ret = hfi1_create_rcvhdrq(dd, uctxt);
-		if (ret)
-			goto done;
-		ret = hfi1_setup_eagerbufs(uctxt);
-		if (ret)
-			goto done;
-		if (uctxt->subctxt_cnt && !fd->subctxt) {
-			ret = setup_subctxt(uctxt);
-			if (ret)
-				goto done;
-		}
-	} else {
-		ret = wait_event_interruptible(uctxt->wait, !test_bit(
-					       HFI1_CTXT_MASTER_UNINIT,
-					       &uctxt->event_flags));
-		if (ret)
-			goto done;
-	}
-
-	ret = hfi1_user_sdma_alloc_queues(uctxt, fp);
-	if (ret)
-		goto done;
-	/*
-	 * Expected receive has to be setup for all processes (including
-	 * shared contexts). However, it has to be done after the master
-	 * context has been fully configured as it depends on the
-	 * eager/expected split of the RcvArray entries.
-	 * Setting it up here ensures that the subcontexts will be waiting
-	 * (due to the above wait_event_interruptible() until the master
-	 * is setup.
-	 */
-	ret = hfi1_user_exp_rcv_init(fp);
-	if (ret)
-		goto done;
-
-	set_bit(HFI1_CTXT_SETUP_DONE, &uctxt->event_flags);
-done:
-	return ret;
-}
-
-static int get_base_info(struct file *fp, void __user *ubase, __u32 len)
-{
-	struct hfi1_base_info binfo;
-	struct hfi1_filedata *fd = fp->private_data;
-	struct hfi1_ctxtdata *uctxt = fd->uctxt;
-	struct hfi1_devdata *dd = uctxt->dd;
-	ssize_t sz;
-	unsigned offset;
-	int ret = 0;
-
-	trace_hfi1_uctxtdata(uctxt->dd, uctxt);
-
-	memset(&binfo, 0, sizeof(binfo));
-	binfo.hw_version = dd->revision;
-	binfo.sw_version = HFI1_KERN_SWVERSION;
-	binfo.bthqp = kdeth_qp;
-	binfo.jkey = uctxt->jkey;
-	/*
-	 * If more than 64 contexts are enabled the allocated credit
-	 * return will span two or three contiguous pages. Since we only
-	 * map the page containing the context's credit return address,
-	 * we need to calculate the offset in the proper page.
-	 */
-	offset = ((u64)uctxt->sc->hw_free -
-		  (u64)dd->cr_base[uctxt->numa_id].va) % PAGE_SIZE;
-	binfo.sc_credits_addr = HFI1_MMAP_TOKEN(PIO_CRED, uctxt->ctxt,
-						fd->subctxt, offset);
-	binfo.pio_bufbase = HFI1_MMAP_TOKEN(PIO_BUFS, uctxt->ctxt,
-					    fd->subctxt,
-					    uctxt->sc->base_addr);
-	binfo.pio_bufbase_sop = HFI1_MMAP_TOKEN(PIO_BUFS_SOP,
-						uctxt->ctxt,
-						fd->subctxt,
-						uctxt->sc->base_addr);
-	binfo.rcvhdr_bufbase = HFI1_MMAP_TOKEN(RCV_HDRQ, uctxt->ctxt,
-					       fd->subctxt,
-					       uctxt->rcvhdrq);
-	binfo.rcvegr_bufbase = HFI1_MMAP_TOKEN(RCV_EGRBUF, uctxt->ctxt,
-					       fd->subctxt,
-					       uctxt->egrbufs.rcvtids[0].phys);
-	binfo.sdma_comp_bufbase = HFI1_MMAP_TOKEN(SDMA_COMP, uctxt->ctxt,
-						 fd->subctxt, 0);
-	/*
-	 * user regs are at
-	 * (RXE_PER_CONTEXT_USER + (ctxt * RXE_PER_CONTEXT_SIZE))
-	 */
-	binfo.user_regbase = HFI1_MMAP_TOKEN(UREGS, uctxt->ctxt,
-					    fd->subctxt, 0);
-	offset = offset_in_page((((uctxt->ctxt - dd->first_user_ctxt) *
-		    HFI1_MAX_SHARED_CTXTS) + fd->subctxt) *
-		  sizeof(*dd->events));
-	binfo.events_bufbase = HFI1_MMAP_TOKEN(EVENTS, uctxt->ctxt,
-					      fd->subctxt,
-					      offset);
-	binfo.status_bufbase = HFI1_MMAP_TOKEN(STATUS, uctxt->ctxt,
-					      fd->subctxt,
-					      dd->status);
-	if (HFI1_CAP_IS_USET(DMA_RTAIL))
-		binfo.rcvhdrtail_base = HFI1_MMAP_TOKEN(RTAIL, uctxt->ctxt,
-						       fd->subctxt, 0);
-	if (uctxt->subctxt_cnt) {
-		binfo.subctxt_uregbase = HFI1_MMAP_TOKEN(SUBCTXT_UREGS,
-							uctxt->ctxt,
-							fd->subctxt, 0);
-		binfo.subctxt_rcvhdrbuf = HFI1_MMAP_TOKEN(SUBCTXT_RCV_HDRQ,
-							 uctxt->ctxt,
-							 fd->subctxt, 0);
-		binfo.subctxt_rcvegrbuf = HFI1_MMAP_TOKEN(SUBCTXT_EGRBUF,
-							 uctxt->ctxt,
-							 fd->subctxt, 0);
-	}
-	sz = (len < sizeof(binfo)) ? len : sizeof(binfo);
-	if (copy_to_user(ubase, &binfo, sz))
-		ret = -EFAULT;
-	return ret;
-}
-
-static unsigned int poll_urgent(struct file *fp,
-				struct poll_table_struct *pt)
-{
-	struct hfi1_filedata *fd = fp->private_data;
-	struct hfi1_ctxtdata *uctxt = fd->uctxt;
-	struct hfi1_devdata *dd = uctxt->dd;
-	unsigned pollflag;
-
-	poll_wait(fp, &uctxt->wait, pt);
-
-	spin_lock_irq(&dd->uctxt_lock);
-	if (uctxt->urgent != uctxt->urgent_poll) {
-		pollflag = POLLIN | POLLRDNORM;
-		uctxt->urgent_poll = uctxt->urgent;
-	} else {
-		pollflag = 0;
-		set_bit(HFI1_CTXT_WAITING_URG, &uctxt->event_flags);
-	}
-	spin_unlock_irq(&dd->uctxt_lock);
-
-	return pollflag;
-}
-
-static unsigned int poll_next(struct file *fp,
-			      struct poll_table_struct *pt)
-{
-	struct hfi1_filedata *fd = fp->private_data;
-	struct hfi1_ctxtdata *uctxt = fd->uctxt;
-	struct hfi1_devdata *dd = uctxt->dd;
-	unsigned pollflag;
-
-	poll_wait(fp, &uctxt->wait, pt);
-
-	spin_lock_irq(&dd->uctxt_lock);
-	if (hdrqempty(uctxt)) {
-		set_bit(HFI1_CTXT_WAITING_RCV, &uctxt->event_flags);
-		hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_ENB, uctxt->ctxt);
-		pollflag = 0;
-	} else {
-		pollflag = POLLIN | POLLRDNORM;
-	}
-	spin_unlock_irq(&dd->uctxt_lock);
-
-	return pollflag;
-}
-
-/*
- * Find all user contexts in use, and set the specified bit in their
- * event mask.
- * See also find_ctxt() for a similar use, that is specific to send buffers.
- */
-int hfi1_set_uevent_bits(struct hfi1_pportdata *ppd, const int evtbit)
-{
-	struct hfi1_ctxtdata *uctxt;
-	struct hfi1_devdata *dd = ppd->dd;
-	unsigned ctxt;
-	int ret = 0;
-	unsigned long flags;
-
-	if (!dd->events) {
-		ret = -EINVAL;
-		goto done;
-	}
-
-	spin_lock_irqsave(&dd->uctxt_lock, flags);
-	for (ctxt = dd->first_user_ctxt; ctxt < dd->num_rcv_contexts;
-	     ctxt++) {
-		uctxt = dd->rcd[ctxt];
-		if (uctxt) {
-			unsigned long *evs = dd->events +
-				(uctxt->ctxt - dd->first_user_ctxt) *
-				HFI1_MAX_SHARED_CTXTS;
-			int i;
-			/*
-			 * subctxt_cnt is 0 if not shared, so do base
-			 * separately, first, then remaining subctxt, if any
-			 */
-			set_bit(evtbit, evs);
-			for (i = 1; i < uctxt->subctxt_cnt; i++)
-				set_bit(evtbit, evs + i);
-		}
-	}
-	spin_unlock_irqrestore(&dd->uctxt_lock, flags);
-done:
-	return ret;
-}
-
-/**
- * manage_rcvq - manage a context's receive queue
- * @uctxt: the context
- * @subctxt: the sub-context
- * @start_stop: action to carry out
- *
- * start_stop == 0 disables receive on the context, for use in queue
- * overflow conditions.  start_stop==1 re-enables, to be used to
- * re-init the software copy of the head register
- */
-static int manage_rcvq(struct hfi1_ctxtdata *uctxt, unsigned subctxt,
-		       int start_stop)
-{
-	struct hfi1_devdata *dd = uctxt->dd;
-	unsigned int rcvctrl_op;
-
-	if (subctxt)
-		goto bail;
-	/* atomically clear receive enable ctxt. */
-	if (start_stop) {
-		/*
-		 * On enable, force in-memory copy of the tail register to
-		 * 0, so that protocol code doesn't have to worry about
-		 * whether or not the chip has yet updated the in-memory
-		 * copy or not on return from the system call. The chip
-		 * always resets it's tail register back to 0 on a
-		 * transition from disabled to enabled.
-		 */
-		if (uctxt->rcvhdrtail_kvaddr)
-			clear_rcvhdrtail(uctxt);
-		rcvctrl_op = HFI1_RCVCTRL_CTXT_ENB;
-	} else {
-		rcvctrl_op = HFI1_RCVCTRL_CTXT_DIS;
-	}
-	hfi1_rcvctrl(dd, rcvctrl_op, uctxt->ctxt);
-	/* always; new head should be equal to new tail; see above */
-bail:
-	return 0;
-}
-
-/*
- * clear the event notifier events for this context.
- * User process then performs actions appropriate to bit having been
- * set, if desired, and checks again in future.
- */
-static int user_event_ack(struct hfi1_ctxtdata *uctxt, int subctxt,
-			  unsigned long events)
-{
-	int i;
-	struct hfi1_devdata *dd = uctxt->dd;
-	unsigned long *evs;
-
-	if (!dd->events)
-		return 0;
-
-	evs = dd->events + ((uctxt->ctxt - dd->first_user_ctxt) *
-			    HFI1_MAX_SHARED_CTXTS) + subctxt;
-
-	for (i = 0; i <= _HFI1_MAX_EVENT_BIT; i++) {
-		if (!test_bit(i, &events))
-			continue;
-		clear_bit(i, evs);
-	}
-	return 0;
-}
-
-static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, unsigned subctxt,
-			 u16 pkey)
-{
-	int ret = -ENOENT, i, intable = 0;
-	struct hfi1_pportdata *ppd = uctxt->ppd;
-	struct hfi1_devdata *dd = uctxt->dd;
-
-	if (pkey == LIM_MGMT_P_KEY || pkey == FULL_MGMT_P_KEY) {
-		ret = -EINVAL;
-		goto done;
-	}
-
-	for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++)
-		if (pkey == ppd->pkeys[i]) {
-			intable = 1;
-			break;
-		}
-
-	if (intable)
-		ret = hfi1_set_ctxt_pkey(dd, uctxt->ctxt, pkey);
-done:
-	return ret;
-}
-
-static int ui_open(struct inode *inode, struct file *filp)
-{
-	struct hfi1_devdata *dd;
-
-	dd = container_of(inode->i_cdev, struct hfi1_devdata, ui_cdev);
-	filp->private_data = dd; /* for other methods */
-	return 0;
-}
-
-static int ui_release(struct inode *inode, struct file *filp)
-{
-	/* nothing to do */
-	return 0;
-}
-
-static loff_t ui_lseek(struct file *filp, loff_t offset, int whence)
-{
-	struct hfi1_devdata *dd = filp->private_data;
-
-	return fixed_size_llseek(filp, offset, whence,
-		(dd->kregend - dd->kregbase) + DC8051_DATA_MEM_SIZE);
-}
-
-/* NOTE: assumes unsigned long is 8 bytes */
-static ssize_t ui_read(struct file *filp, char __user *buf, size_t count,
-		       loff_t *f_pos)
-{
-	struct hfi1_devdata *dd = filp->private_data;
-	void __iomem *base = dd->kregbase;
-	unsigned long total, csr_off,
-		barlen = (dd->kregend - dd->kregbase);
-	u64 data;
-
-	/* only read 8 byte quantities */
-	if ((count % 8) != 0)
-		return -EINVAL;
-	/* offset must be 8-byte aligned */
-	if ((*f_pos % 8) != 0)
-		return -EINVAL;
-	/* destination buffer must be 8-byte aligned */
-	if ((unsigned long)buf % 8 != 0)
-		return -EINVAL;
-	/* must be in range */
-	if (*f_pos + count > (barlen + DC8051_DATA_MEM_SIZE))
-		return -EINVAL;
-	/* only set the base if we are not starting past the BAR */
-	if (*f_pos < barlen)
-		base += *f_pos;
-	csr_off = *f_pos;
-	for (total = 0; total < count; total += 8, csr_off += 8) {
-		/* accessing LCB CSRs requires more checks */
-		if (is_lcb_offset(csr_off)) {
-			if (read_lcb_csr(dd, csr_off, (u64 *)&data))
-				break; /* failed */
-		}
-		/*
-		 * Cannot read ASIC GPIO/QSFP* clear and force CSRs without a
-		 * false parity error.  Avoid the whole issue by not reading
-		 * them.  These registers are defined as having a read value
-		 * of 0.
-		 */
-		else if (csr_off == ASIC_GPIO_CLEAR ||
-			 csr_off == ASIC_GPIO_FORCE ||
-			 csr_off == ASIC_QSFP1_CLEAR ||
-			 csr_off == ASIC_QSFP1_FORCE ||
-			 csr_off == ASIC_QSFP2_CLEAR ||
-			 csr_off == ASIC_QSFP2_FORCE)
-			data = 0;
-		else if (csr_off >= barlen) {
-			/*
-			 * read_8051_data can read more than just 8 bytes at
-			 * a time. However, folding this into the loop and
-			 * handling the reads in 8 byte increments allows us
-			 * to smoothly transition from chip memory to 8051
-			 * memory.
-			 */
-			if (read_8051_data(dd,
-					   (u32)(csr_off - barlen),
-					   sizeof(data), &data))
-				break; /* failed */
-		} else
-			data = readq(base + total);
-		if (put_user(data, (unsigned long __user *)(buf + total)))
-			break;
-	}
-	*f_pos += total;
-	return total;
-}
-
-/* NOTE: assumes unsigned long is 8 bytes */
-static ssize_t ui_write(struct file *filp, const char __user *buf,
-			size_t count, loff_t *f_pos)
-{
-	struct hfi1_devdata *dd = filp->private_data;
-	void __iomem *base;
-	unsigned long total, data, csr_off;
-	int in_lcb;
-
-	/* only write 8 byte quantities */
-	if ((count % 8) != 0)
-		return -EINVAL;
-	/* offset must be 8-byte aligned */
-	if ((*f_pos % 8) != 0)
-		return -EINVAL;
-	/* source buffer must be 8-byte aligned */
-	if ((unsigned long)buf % 8 != 0)
-		return -EINVAL;
-	/* must be in range */
-	if (*f_pos + count > dd->kregend - dd->kregbase)
-		return -EINVAL;
-
-	base = (void __iomem *)dd->kregbase + *f_pos;
-	csr_off = *f_pos;
-	in_lcb = 0;
-	for (total = 0; total < count; total += 8, csr_off += 8) {
-		if (get_user(data, (unsigned long __user *)(buf + total)))
-			break;
-		/* accessing LCB CSRs requires a special procedure */
-		if (is_lcb_offset(csr_off)) {
-			if (!in_lcb) {
-				int ret = acquire_lcb_access(dd, 1);
-
-				if (ret)
-					break;
-				in_lcb = 1;
-			}
-		} else {
-			if (in_lcb) {
-				release_lcb_access(dd, 1);
-				in_lcb = 0;
-			}
-		}
-		writeq(data, base + total);
-	}
-	if (in_lcb)
-		release_lcb_access(dd, 1);
-	*f_pos += total;
-	return total;
-}
-
-static const struct file_operations ui_file_ops = {
-	.owner = THIS_MODULE,
-	.llseek = ui_lseek,
-	.read = ui_read,
-	.write = ui_write,
-	.open = ui_open,
-	.release = ui_release,
-};
-
-#define UI_OFFSET 192	/* device minor offset for UI devices */
-static int create_ui = 1;
-
-static struct cdev wildcard_cdev;
-static struct device *wildcard_device;
-
-static atomic_t user_count = ATOMIC_INIT(0);
-
-static void user_remove(struct hfi1_devdata *dd)
-{
-	if (atomic_dec_return(&user_count) == 0)
-		hfi1_cdev_cleanup(&wildcard_cdev, &wildcard_device);
-
-	hfi1_cdev_cleanup(&dd->user_cdev, &dd->user_device);
-	hfi1_cdev_cleanup(&dd->ui_cdev, &dd->ui_device);
-}
-
-static int user_add(struct hfi1_devdata *dd)
-{
-	char name[10];
-	int ret;
-
-	if (atomic_inc_return(&user_count) == 1) {
-		ret = hfi1_cdev_init(0, class_name(), &hfi1_file_ops,
-				     &wildcard_cdev, &wildcard_device,
-				     true);
-		if (ret)
-			goto done;
-	}
-
-	snprintf(name, sizeof(name), "%s_%d", class_name(), dd->unit);
-	ret = hfi1_cdev_init(dd->unit + 1, name, &hfi1_file_ops,
-			     &dd->user_cdev, &dd->user_device,
-			     true);
-	if (ret)
-		goto done;
-
-	if (create_ui) {
-		snprintf(name, sizeof(name),
-			 "%s_ui%d", class_name(), dd->unit);
-		ret = hfi1_cdev_init(dd->unit + UI_OFFSET, name, &ui_file_ops,
-				     &dd->ui_cdev, &dd->ui_device,
-				     false);
-		if (ret)
-			goto done;
-	}
-
-	return 0;
-done:
-	user_remove(dd);
-	return ret;
-}
-
-/*
- * Create per-unit files in /dev
- */
-int hfi1_device_create(struct hfi1_devdata *dd)
-{
-	int r, ret;
-
-	r = user_add(dd);
-	ret = hfi1_diag_add(dd);
-	if (r && !ret)
-		ret = r;
-	return ret;
-}
-
-/*
- * Remove per-unit files in /dev
- * void, core kernel returns no errors for this stuff
- */
-void hfi1_device_remove(struct hfi1_devdata *dd)
-{
-	user_remove(dd);
-	hfi1_diag_remove(dd);
-}